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Polypac Hydraulic Seals – Precision Sealing Solutions

Hydraulic Seals by Polypac: Precision Sealing Solutions

Overview

Polypac specializes in Hydraulic Seals and oil seals engineered for demanding hydraulic systems. Founded in 2008, we combine scientific research with industrial experience to deliver reliable seals for cylinders, pumps, valves and actuators. Our product range includes filled PTFE seals and elastomer O-rings in NBR, FKM, silicone, EPDM and FFKM to meet diverse chemical, temperature and pressure requirements.

Advanced Materials & Manufacturing

We manufacture seals using advanced compounds such as bronze-filled PTFE, carbon-filled PTFE, graphite PTFE, MoS₂-filled PTFE and glass-filled PTFE. Our custom rubber ring and O-ring factory spans over 10,000 square meters with 8,000 square meters of production space, equipped with industry-leading production and testing equipment to assure consistent quality for every Hydraulic Seals order.

Customization & R&D

Polypac excels at customized sealing solutions for special working conditions — high temperature, aggressive fluids, extreme pressure and abrasive environments. We maintain long-term collaborations with top universities and research institutions domestically and internationally to continuously develop sealing materials and optimize seal geometries for extended service life.

Quality Control & Testing

Every Hydraulic Seals product undergoes strict inspection and functional testing. Our laboratory capabilities include material analysis, life-cycle testing, leakage assessment and dimensional verification. This rigorous quality control ensures reliable performance in critical hydraulic systems and reduces downtime for OEMs and maintenance teams.

Applications & Industries

Polypac Hydraulic Seals serve construction machinery, agriculture, marine, oil & gas, industrial automation and renewable energy sectors. Our seals are designed to withstand dynamic reciprocating motion, high static pressure and harsh media, enabling safe and efficient hydraulic operation in diverse applications.

Why Choose Polypac

Choose Polypac for proven expertise in seal production, fast prototype development, and scalable manufacturing. Our combination of advanced materials, bespoke engineering and comprehensive testing delivers Hydraulic Seals that enhance reliability, extend service intervals and lower total cost of ownership. Contact Polypac for consultation, custom quotes and sample evaluation.

Hydraulic Seals Display

FAQ:

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

How do I choose the right material for my sealing application?

Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.

How can I prevent seal damage during installation?

Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.

When should I use a spring-energized seal instead of a standard elastomeric seal?

Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.

Table of Contents

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Hydraulic Seals by Polypac: Precision Sealing Solutions
Overview
Advanced Materials & Manufacturing
Customization & R&D
Quality Control & Testing
Applications & Industries
Why Choose Polypac
Hydraulic Seals Display

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